
6.PARAMETERS B-63494EN/02
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6.4.4 Closed Loop Control
When using a separate position detector, make the following
parameter settings:
(1) With the dual check safety function, the monitor reads feedback
information from the built-in pulse coder. So, the following
parameters need to be set for a machine that involves sliding
between the motor (built-in pulse coder) and separate position
detector or has such a mechanical structure that the gear ratio
between the motor and separate position detector is not constant:
• Bit 0 (NP2x) of parameter No. 13802 = 1 (setting for not
monitoring position in dual mode)
• Bit 1 (TR2x) of parameter No. 13802 = 1 (setting for
monitoring speed in dual mode by motor speed)
At this time, the increment system for the safety speed
parameters changes. See the settings of parameter No. 1942
and No. 13821 through No. 13824 in Section 6.2.
CAUTION
If the settings above are used with a linear axis, the
requirements for the safety function cannot be
satisfied. So, the parameters above can be used
with a rotation axis only.
(2) When backlash compensation is to be reflected in position
• Bit 4 (HBSF) of parameter No. 2206 = 1 (setting for adding
compensation pulses to the semi-closed loop and closed
loop at the same time)
With a closed-loop machine, backlash compensation is not
reflected in position usually. So, set bit 0 of parameter No.
2006 to 1. To reflect backlash compensation in position for
a reason, set bit 0 of parameter No. 2006 to 0 and also set
the bit mentioned above.